2 * inet and unix socket functions for qemu
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; under version 2 of the License.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
22 #include "qemu_socket.h"
23 #include "qemu-common.h" /* for qemu_isdigit */
26 # define AI_ADDRCONFIG 0
29 static int sockets_debug = 0;
30 static const int on=1, off=0;
32 /* used temporarely until all users are converted to QemuOpts */
33 static QemuOptsList dummy_opts = {
35 .head = QTAILQ_HEAD_INITIALIZER(dummy_opts.head),
39 .type = QEMU_OPT_STRING,
42 .type = QEMU_OPT_STRING,
45 .type = QEMU_OPT_STRING,
48 .type = QEMU_OPT_NUMBER,
51 .type = QEMU_OPT_BOOL,
54 .type = QEMU_OPT_BOOL,
60 static int inet_getport(struct addrinfo *e)
62 struct sockaddr_in *i4;
63 struct sockaddr_in6 *i6;
65 switch (e->ai_family) {
67 i6 = (void*)e->ai_addr;
68 return ntohs(i6->sin6_port);
70 i4 = (void*)e->ai_addr;
71 return ntohs(i4->sin_port);
77 static void inet_setport(struct addrinfo *e, int port)
79 struct sockaddr_in *i4;
80 struct sockaddr_in6 *i6;
82 switch (e->ai_family) {
84 i6 = (void*)e->ai_addr;
85 i6->sin6_port = htons(port);
88 i4 = (void*)e->ai_addr;
89 i4->sin_port = htons(port);
94 static const char *inet_strfamily(int family)
97 case PF_INET6: return "ipv6";
98 case PF_INET: return "ipv4";
99 case PF_UNIX: return "unix";
104 static void inet_print_addrinfo(const char *tag, struct addrinfo *res)
107 char uaddr[INET6_ADDRSTRLEN+1];
110 for (e = res; e != NULL; e = e->ai_next) {
111 getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen,
112 uaddr,INET6_ADDRSTRLEN,uport,32,
113 NI_NUMERICHOST | NI_NUMERICSERV);
114 fprintf(stderr,"%s: getaddrinfo: family %s, host %s, port %s\n",
115 tag, inet_strfamily(e->ai_family), uaddr, uport);
119 int inet_listen_opts(QemuOpts *opts, int port_offset)
121 struct addrinfo ai,*res,*e;
124 char uaddr[INET6_ADDRSTRLEN+1];
126 int slisten,rc,to,try_next;
128 memset(&ai,0, sizeof(ai));
129 ai.ai_flags = AI_PASSIVE | AI_ADDRCONFIG;
130 ai.ai_family = PF_UNSPEC;
131 ai.ai_socktype = SOCK_STREAM;
133 if (qemu_opt_get(opts, "port") == NULL) {
134 fprintf(stderr, "%s: host and/or port not specified\n", __FUNCTION__);
137 pstrcpy(port, sizeof(port), qemu_opt_get(opts, "port"));
138 addr = qemu_opt_get(opts, "host");
140 to = qemu_opt_get_number(opts, "to", 0);
141 if (qemu_opt_get_bool(opts, "ipv4", 0))
142 ai.ai_family = PF_INET;
143 if (qemu_opt_get_bool(opts, "ipv6", 0))
144 ai.ai_family = PF_INET6;
148 snprintf(port, sizeof(port), "%d", atoi(port) + port_offset);
149 rc = getaddrinfo(strlen(addr) ? addr : NULL, port, &ai, &res);
151 fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
156 inet_print_addrinfo(__FUNCTION__, res);
158 /* create socket + bind */
159 for (e = res; e != NULL; e = e->ai_next) {
160 getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen,
161 uaddr,INET6_ADDRSTRLEN,uport,32,
162 NI_NUMERICHOST | NI_NUMERICSERV);
163 slisten = qemu_socket(e->ai_family, e->ai_socktype, e->ai_protocol);
165 fprintf(stderr,"%s: socket(%s): %s\n", __FUNCTION__,
166 inet_strfamily(e->ai_family), strerror(errno));
170 setsockopt(slisten,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on));
172 if (e->ai_family == PF_INET6) {
173 /* listen on both ipv4 and ipv6 */
174 setsockopt(slisten,IPPROTO_IPV6,IPV6_V6ONLY,(void*)&off,
180 if (bind(slisten, e->ai_addr, e->ai_addrlen) == 0) {
182 fprintf(stderr,"%s: bind(%s,%s,%d): OK\n", __FUNCTION__,
183 inet_strfamily(e->ai_family), uaddr, inet_getport(e));
186 try_next = to && (inet_getport(e) <= to + port_offset);
187 if (!try_next || sockets_debug)
188 fprintf(stderr,"%s: bind(%s,%s,%d): %s\n", __FUNCTION__,
189 inet_strfamily(e->ai_family), uaddr, inet_getport(e),
192 inet_setport(e, inet_getport(e) + 1);
197 closesocket(slisten);
199 fprintf(stderr, "%s: FAILED\n", __FUNCTION__);
204 if (listen(slisten,1) != 0) {
206 closesocket(slisten);
210 snprintf(uport, sizeof(uport), "%d", inet_getport(e) - port_offset);
211 qemu_opt_set(opts, "host", uaddr);
212 qemu_opt_set(opts, "port", uport);
213 qemu_opt_set(opts, "ipv6", (e->ai_family == PF_INET6) ? "on" : "off");
214 qemu_opt_set(opts, "ipv4", (e->ai_family != PF_INET6) ? "on" : "off");
219 int inet_connect_opts(QemuOpts *opts)
221 struct addrinfo ai,*res,*e;
224 char uaddr[INET6_ADDRSTRLEN+1];
228 memset(&ai,0, sizeof(ai));
229 ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
230 ai.ai_family = PF_UNSPEC;
231 ai.ai_socktype = SOCK_STREAM;
233 addr = qemu_opt_get(opts, "host");
234 port = qemu_opt_get(opts, "port");
235 if (addr == NULL || port == NULL) {
236 fprintf(stderr, "inet_connect: host and/or port not specified\n");
240 if (qemu_opt_get_bool(opts, "ipv4", 0))
241 ai.ai_family = PF_INET;
242 if (qemu_opt_get_bool(opts, "ipv6", 0))
243 ai.ai_family = PF_INET6;
246 if (0 != (rc = getaddrinfo(addr, port, &ai, &res))) {
247 fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
252 inet_print_addrinfo(__FUNCTION__, res);
254 for (e = res; e != NULL; e = e->ai_next) {
255 if (getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen,
256 uaddr,INET6_ADDRSTRLEN,uport,32,
257 NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
258 fprintf(stderr,"%s: getnameinfo: oops\n", __FUNCTION__);
261 sock = qemu_socket(e->ai_family, e->ai_socktype, e->ai_protocol);
263 fprintf(stderr,"%s: socket(%s): %s\n", __FUNCTION__,
264 inet_strfamily(e->ai_family), strerror(errno));
267 setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on));
269 /* connect to peer */
270 if (connect(sock,e->ai_addr,e->ai_addrlen) < 0) {
271 if (sockets_debug || NULL == e->ai_next)
272 fprintf(stderr, "%s: connect(%s,%s,%s,%s): %s\n", __FUNCTION__,
273 inet_strfamily(e->ai_family),
274 e->ai_canonname, uaddr, uport, strerror(errno));
279 fprintf(stderr, "%s: connect(%s,%s,%s,%s): OK\n", __FUNCTION__,
280 inet_strfamily(e->ai_family),
281 e->ai_canonname, uaddr, uport);
289 int inet_dgram_opts(QemuOpts *opts)
291 struct addrinfo ai, *peer = NULL, *local = NULL;
294 char uaddr[INET6_ADDRSTRLEN+1];
298 /* lookup peer addr */
299 memset(&ai,0, sizeof(ai));
300 ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
301 ai.ai_family = PF_UNSPEC;
302 ai.ai_socktype = SOCK_DGRAM;
304 addr = qemu_opt_get(opts, "host");
305 port = qemu_opt_get(opts, "port");
306 if (addr == NULL || strlen(addr) == 0) {
309 if (port == NULL || strlen(port) == 0) {
310 fprintf(stderr, "inet_dgram: port not specified\n");
314 if (qemu_opt_get_bool(opts, "ipv4", 0))
315 ai.ai_family = PF_INET;
316 if (qemu_opt_get_bool(opts, "ipv6", 0))
317 ai.ai_family = PF_INET6;
319 if (0 != (rc = getaddrinfo(addr, port, &ai, &peer))) {
320 fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
325 fprintf(stderr, "%s: peer (%s:%s)\n", __FUNCTION__, addr, port);
326 inet_print_addrinfo(__FUNCTION__, peer);
329 /* lookup local addr */
330 memset(&ai,0, sizeof(ai));
331 ai.ai_flags = AI_PASSIVE;
332 ai.ai_family = peer->ai_family;
333 ai.ai_socktype = SOCK_DGRAM;
335 addr = qemu_opt_get(opts, "localaddr");
336 port = qemu_opt_get(opts, "localport");
337 if (addr == NULL || strlen(addr) == 0) {
340 if (!port || strlen(port) == 0)
343 if (0 != (rc = getaddrinfo(addr, port, &ai, &local))) {
344 fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
349 fprintf(stderr, "%s: local (%s:%s)\n", __FUNCTION__, addr, port);
350 inet_print_addrinfo(__FUNCTION__, local);
354 sock = qemu_socket(peer->ai_family, peer->ai_socktype, peer->ai_protocol);
356 fprintf(stderr,"%s: socket(%s): %s\n", __FUNCTION__,
357 inet_strfamily(peer->ai_family), strerror(errno));
360 setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on));
363 if (getnameinfo((struct sockaddr*)local->ai_addr,local->ai_addrlen,
364 uaddr,INET6_ADDRSTRLEN,uport,32,
365 NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
366 fprintf(stderr, "%s: getnameinfo: oops\n", __FUNCTION__);
369 if (bind(sock, local->ai_addr, local->ai_addrlen) < 0) {
370 fprintf(stderr,"%s: bind(%s,%s,%d): OK\n", __FUNCTION__,
371 inet_strfamily(local->ai_family), uaddr, inet_getport(local));
375 /* connect to peer */
376 if (getnameinfo((struct sockaddr*)peer->ai_addr, peer->ai_addrlen,
377 uaddr, INET6_ADDRSTRLEN, uport, 32,
378 NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
379 fprintf(stderr, "%s: getnameinfo: oops\n", __FUNCTION__);
382 if (connect(sock,peer->ai_addr,peer->ai_addrlen) < 0) {
383 fprintf(stderr, "%s: connect(%s,%s,%s,%s): %s\n", __FUNCTION__,
384 inet_strfamily(peer->ai_family),
385 peer->ai_canonname, uaddr, uport, strerror(errno));
403 /* compatibility wrapper */
404 static int inet_parse(QemuOpts *opts, const char *str)
406 const char *optstr, *h;
415 if (1 != sscanf(str,":%32[^,]%n",port,&pos)) {
416 fprintf(stderr, "%s: portonly parse error (%s)\n",
420 } else if (str[0] == '[') {
422 if (2 != sscanf(str,"[%64[^]]]:%32[^,]%n",addr,port,&pos)) {
423 fprintf(stderr, "%s: ipv6 parse error (%s)\n",
427 qemu_opt_set(opts, "ipv6", "yes");
428 } else if (qemu_isdigit(str[0])) {
430 if (2 != sscanf(str,"%64[0-9.]:%32[^,]%n",addr,port,&pos)) {
431 fprintf(stderr, "%s: ipv4 parse error (%s)\n",
435 qemu_opt_set(opts, "ipv4", "yes");
438 if (2 != sscanf(str,"%64[^:]:%32[^,]%n",addr,port,&pos)) {
439 fprintf(stderr, "%s: hostname parse error (%s)\n",
444 qemu_opt_set(opts, "host", addr);
445 qemu_opt_set(opts, "port", port);
449 h = strstr(optstr, ",to=");
451 qemu_opt_set(opts, "to", h+4);
452 if (strstr(optstr, ",ipv4"))
453 qemu_opt_set(opts, "ipv4", "yes");
454 if (strstr(optstr, ",ipv6"))
455 qemu_opt_set(opts, "ipv6", "yes");
459 int inet_listen(const char *str, char *ostr, int olen,
460 int socktype, int port_offset)
466 opts = qemu_opts_create(&dummy_opts, NULL, 0);
467 if (inet_parse(opts, str) == 0) {
468 sock = inet_listen_opts(opts, port_offset);
469 if (sock != -1 && ostr) {
470 optstr = strchr(str, ',');
471 if (qemu_opt_get_bool(opts, "ipv6", 0)) {
472 snprintf(ostr, olen, "[%s]:%s%s",
473 qemu_opt_get(opts, "host"),
474 qemu_opt_get(opts, "port"),
475 optstr ? optstr : "");
477 snprintf(ostr, olen, "%s:%s%s",
478 qemu_opt_get(opts, "host"),
479 qemu_opt_get(opts, "port"),
480 optstr ? optstr : "");
488 int inet_connect(const char *str, int socktype)
493 opts = qemu_opts_create(&dummy_opts, NULL, 0);
494 if (inet_parse(opts, str) == 0)
495 sock = inet_connect_opts(opts);
502 int unix_listen_opts(QemuOpts *opts)
504 struct sockaddr_un un;
505 const char *path = qemu_opt_get(opts, "path");
508 sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
510 perror("socket(unix)");
514 memset(&un, 0, sizeof(un));
515 un.sun_family = AF_UNIX;
516 if (path && strlen(path)) {
517 snprintf(un.sun_path, sizeof(un.sun_path), "%s", path);
519 char *tmpdir = getenv("TMPDIR");
520 snprintf(un.sun_path, sizeof(un.sun_path), "%s/qemu-socket-XXXXXX",
521 tmpdir ? tmpdir : "/tmp");
523 * This dummy fd usage silences the mktemp() unsecure warning.
524 * Using mkstemp() doesn't make things more secure here
525 * though. bind() complains about existing files, so we have
526 * to unlink first and thus re-open the race window. The
527 * worst case possible is bind() failing, i.e. a DoS attack.
529 fd = mkstemp(un.sun_path); close(fd);
530 qemu_opt_set(opts, "path", un.sun_path);
534 if (bind(sock, (struct sockaddr*) &un, sizeof(un)) < 0) {
535 fprintf(stderr, "bind(unix:%s): %s\n", un.sun_path, strerror(errno));
538 if (listen(sock, 1) < 0) {
539 fprintf(stderr, "listen(unix:%s): %s\n", un.sun_path, strerror(errno));
544 fprintf(stderr, "bind(unix:%s): OK\n", un.sun_path);
552 int unix_connect_opts(QemuOpts *opts)
554 struct sockaddr_un un;
555 const char *path = qemu_opt_get(opts, "path");
559 fprintf(stderr, "unix connect: no path specified\n");
563 sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
565 perror("socket(unix)");
569 memset(&un, 0, sizeof(un));
570 un.sun_family = AF_UNIX;
571 snprintf(un.sun_path, sizeof(un.sun_path), "%s", path);
572 if (connect(sock, (struct sockaddr*) &un, sizeof(un)) < 0) {
573 fprintf(stderr, "connect(unix:%s): %s\n", path, strerror(errno));
578 fprintf(stderr, "connect(unix:%s): OK\n", path);
582 /* compatibility wrapper */
583 int unix_listen(const char *str, char *ostr, int olen)
589 opts = qemu_opts_create(&dummy_opts, NULL, 0);
591 optstr = strchr(str, ',');
595 path = qemu_malloc(len+1);
596 snprintf(path, len+1, "%.*s", len, str);
597 qemu_opt_set(opts, "path", path);
601 qemu_opt_set(opts, "path", str);
604 sock = unix_listen_opts(opts);
606 if (sock != -1 && ostr)
607 snprintf(ostr, olen, "%s%s", qemu_opt_get(opts, "path"), optstr ? optstr : "");
612 int unix_connect(const char *path)
617 opts = qemu_opts_create(&dummy_opts, NULL, 0);
618 qemu_opt_set(opts, "path", path);
619 sock = unix_connect_opts(opts);
626 int unix_listen_opts(QemuOpts *opts)
628 fprintf(stderr, "unix sockets are not available on windows\n");
632 int unix_connect_opts(QemuOpts *opts)
634 fprintf(stderr, "unix sockets are not available on windows\n");
638 int unix_listen(const char *path, char *ostr, int olen)
640 fprintf(stderr, "unix sockets are not available on windows\n");
644 int unix_connect(const char *path)
646 fprintf(stderr, "unix sockets are not available on windows\n");